Add Secondary Axis to Matplotlib Plot

Python

Here we add a secondary axis to a plot for the ax2 object.

 1|  #Secondary Axis
 2|  #https://matplotlib.org/gallery/api/two_scales.html
 3|  
 4|  fig, ax = plt.subplots(figsize=(12,7)) 
 5|  
 6|  #Plot net sales value by week data on ax
 7|  ax.plot(sales_by_week['Week'], sales_by_week['Net_Sale_Value'], label='Net Sales', color='blue')
 8|  
 9|  #Create second axes object ax2 and set to share the x axis with ax object
10|  ax2 = ax.twinx() 
11|  
12|  #Plot profit by week on second object
13|  ax2.plot(sales_by_week['Week'], sales_by_week['Profit'], label='Profit', color='red')
14|  
15|  #Label axes
16|  ax.set_xlabel('Week')
17|  ax.set_ylabel('Net Sales')
18|  ax2.set_ylabel('Profit') #Label secondary axis
19|  
20|  plt.show()
Add Secondary Axis to Matplotlib Plot
analyseup
Matplotlib
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